#!/bin/bash
#
# Copyright (C) 2009 Red Hat, Inc.
# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
#
# standard filters
#

# Checks that given_value is in range of correct_value +/- tolerance.
# Tolerance can be an absolute value or a percentage of the correct value
# (see examples with tolerances below).
# Outputs suitable message to stdout if it's not in range.
#
# A verbose option, -v, may be used as the LAST argument
# 
# e.g. 
# foo: 0.0298 = 0.03 +/- 5%
# _within_tolerance "foo" 0.0298 0.03 5%  
# 
# foo: 0.0298 = 0.03 +/- 0.01
# _within_tolerance "foo" 0.0298 0.03 0.01
#
# foo: 0.0298 = 0.03 -0.01 +0.002
# _within_tolerance "foo" 0.0298 0.03 0.01 0.002
#
# foo: verbose output of 0.0298 = 0.03 +/- 5% 
# _within_tolerance "foo" 0.0298 0.03 5% -v 
_within_tolerance()
{
  _name=$1
  _given_val=$2
  _correct_val=$3
  _mintol=$4
  _maxtol=$_mintol
  _verbose=0
  _debug=false

  # maxtol arg is optional
  # verbose arg is optional
  if [ $# -ge 5 ]
  then 
     if [ "$5" = "-v" ]
     then
	_verbose=1
     else
        _maxtol=$5
     fi
  fi
  if [ $# -ge 6 ]
  then
     [ "$6" = "-v" ] && _verbose=1
  fi

  # find min with or without %
  _mintolerance=`echo $_mintol | sed -e 's/%//'` 
  if [ $_mintol = $_mintolerance ]
  then 
      _min=`echo "scale=5; $_correct_val-$_mintolerance" | bc`
  else
      _min=`echo "scale=5; $_correct_val-$_mintolerance*0.01*$_correct_val" | bc`
  fi

  # find max with or without %
  _maxtolerance=`echo $_maxtol | sed -e 's/%//'` 
  if [ $_maxtol = $_maxtolerance ]
  then 
      _max=`echo "scale=5; $_correct_val+$_maxtolerance" | bc`
  else
      _max=`echo "scale=5; $_correct_val+$_maxtolerance*0.01*$_correct_val" | bc`
  fi

  $_debug && echo "min = $_min"
  $_debug && echo "max = $_max"

  cat <<EOF >$tmp.bc.1
scale=5;
if ($_min <= $_given_val) 1;
if ($_min > $_given_val) 0; 
EOF

  cat <<EOF >$tmp.bc.2
scale=5;
if ($_given_val <= $_max) 1;
if ($_given_val > $_max) 0;
EOF

  _above_min=`bc <$tmp.bc.1`
  _below_max=`bc <$tmp.bc.2`

  rm -f $tmp.bc.[12]

  _in_range=`expr $_above_min \& $_below_max` 

  # fix up min, max precision for output
  # can vary for 5.3, 6.2
  _min=`echo $_min | sed -e 's/0*$//'` # get rid of trailling zeroes
  _max=`echo $_max | sed -e 's/0*$//'` # get rid of trailling zeroes

  if [ $_in_range -eq 1 ] 
  then
	[ $_verbose -eq 1 ] && echo $_name is in range
	return 0
  else
	[ $_verbose -eq 1 ] && echo $_name has value of $_given_val
	[ $_verbose -eq 1 ] && echo $_name is NOT in range $_min .. $_max	
	return 1
  fi
}

# ctime(3) dates
#
_filter_date()
{
    sed \
	-e 's/[A-Z][a-z][a-z] [A-z][a-z][a-z]  *[0-9][0-9]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9][0-9][0-9][0-9]$/DATE/'
}

# replace occurrences of the actual TEST_DIR value with TEST_DIR
_filter_testdir()
{
    sed -e "s#$TEST_DIR#TEST_DIR#g"
}

# replace occurrences of the actual IMGFMT value with IMGFMT
_filter_imgfmt()
{
    sed -e "s#$IMGFMT#IMGFMT#g"
}

# Removes \r from messages
_filter_win32()
{
    sed -e 's/\r//g'
}

# sanitize qemu-io output
_filter_qemu_io()
{
    _filter_win32 | sed -e "s/[0-9]* ops\; [0-9/:. sec]* ([0-9/.inf]* [EPTGMKiBbytes]*\/sec and [0-9/.inf]* ops\/sec)/X ops\; XX:XX:XX.X (XXX YYY\/sec and XXX ops\/sec)/"
}

# make sure this script returns success
/bin/true
